If he wasn’t involving students in any way, I don’t care about him playing dress up and taking pictures. I can see lots of concerns about some of the other elements of the story, though, and I hope he gets some help because I suspect he needs it. (My sympathies – I can hear the depression in those short sentences.)
Sure. Look up “Knockers the Clown” a character that educator Ducky Doolittle used to perform as. Ducky is a really cool person and has a great time as Knockers. She and another clown also pulled a hilarious fast one on Larry Elder’s obnoxious “Moral Court” show.